一种碳化钨-碳化铬高温复合粉末及其制备方法
By constructing strongly bonded Co-WC units through a two-step process, the problem of weak interfacial bonding strength in WC-Cr3C2-NiCr coatings was solved, significantly improving coating hardness and wear resistance, and achieving cost reduction and performance improvement.
CN121737548BActive Publication Date: 2026-07-17CHENGDU DAGUANG NEW MATERIAL CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHENGDU DAGUANG NEW MATERIAL CO LTD
- Filing Date
- 2026-01-27
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
The existing WC-Cr3C2-NiCr coating has weak interfacial bonding strength, resulting in insufficient hardness and wear resistance, which cannot meet the requirements of high-performance working conditions, and the cost is also high.
Method used
A two-step process of pre-alloying followed by composite sintering was adopted. By staged heating and atmosphere control, strong Co-WC units were constructed to improve the interfacial bonding strength and prepare tungsten carbide-chromium carbide high-temperature composite powder.
Benefits of technology
The microhardness is increased to over 1180HV, and the wear resistance reaches over 95% of that of the traditional WC-12Co coating, significantly reducing costs while providing better high-temperature oxidation resistance.
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Abstract
本发明公开了一种碳化钨‑碳化铬高温复合粉末及其制备方法，涉及热喷涂涂层材料领域。一种碳化钨‑碳化铬高温复合粉末，按质量百分数计，包括以下组分：碳化钨18~27%，钴2~5%，镍铬合金15~25%，碳化铬45~60%。碳化钨‑碳化铬高温复合粉末的制备方法，包括以下步骤：S100、将碳化钨粉与钴粉混合后，进行第一次烧结，得到预合金化的钴‑碳化钨硬质相粉末；S200、将预合金化的钴‑碳化钨硬质相粉末、镍铬合金粉、碳化铬粉混合后，进行第二次烧结，得到所述高耐磨碳化钨‑碳化铬高温复合粉末。本发明所制备的复合粉末经热喷涂后形成的涂层，显微硬度可提升至1180HV以上，耐磨性能达到传统优质WC‑12Co涂层的95%以上，远优于传统一次烧结法制备的同类体系涂层。
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